제출 #866977

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
866977		iskhakkutbilim	Knapsack (NOI18_knapsack)	C++17	100 / 100	64 ms	36432 KiB

knapsack

#include <bits/stdc++.h>
using namespace std;

#define int long long
#define ff first
#define ss second
#define all(a) a.begin(), a.end()
const int mod = 1e9 + 7;
const int N = 1e5;

main(){
   ios::sync_with_stdio(0);
   cin.tie(0); cout.tie(0);
	int s, n; cin >> s >> n;
	vector<int> dp(s+1, LLONG_MIN);
	vector<pair<int, int> > items[s+1];
	vector< vector<int> > weights(s+1, vector<int>(s+1, 0));
	dp[0] = 0;
	for(int i = 1;i <= n; i++){
		int V, W, K; cin >> V >> W >> K;
		items[W].push_back({V, K});
	}
	for(int i = 1;i <= s; i++){
		sort(all(items[i]));
		for(int j = 1;j <= s && items[i].size(); j++){
			weights[i][j] = weights[i][j-1] + items[i].back().ff;
			items[i].back().ss--;
			if(items[i].back().ss == 0) items[i].pop_back();
		}
	}
	for(int i = 1;i <= s; i++){
			for(int d = s; d>= 0; d--){
				for(int round = 1; d-round * i >= 0 && round <= s; round++){
					dp[d] = max(dp[d], dp[d-round*i] + weights[i][round]);
				}
			}
	}
	int ans = LLONG_MIN;
	for(int i = 0;i <= s; i++){
		ans = max(ans, dp[i]);
	}
	cout << ans;
	return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

knapsack.cpp:11:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   11 | main(){
      | ^~~~

• Subtask 1: 12 / 12
• Subtask 2: 17 / 17
• Subtask 3: 20 / 20
• Subtask 4: 24 / 24
• Subtask 5: 27 / 27